<div class="page-error tile" style="text-align: center">
    <h1><i class="fa fa-exclamation-circle"></i> 404错误: 页面不存在</h1>
    <h1><i class="fa fa-exclamation-circle"></i> Error 404: Page not found</h1>
    <p><a class="btn btn-primary" href="javascript:window.history.back();">返回</a></p>
</div>